<div id="content">
    <form id="validate_form" action="index.php?route=categorie&action=traitement_ajout" method="post">
        <label>Catégorie</label>
        <input type="text" name="nom" id="nom" class="validate[required]"/><span id="mess_exist"></span>
        <input type="submit" id="valider" />
    </form>
</div>
